Coryphantha macromeris (Pelycephora) Artesia, NM form

Coryphantha macromeris is a species from southern New Mexico into Mexico. These plants can be Giants. Stems can get 10" across and mound to 30" across. Our plants have taken -22F without damage in our garden. Plants have survived many years in our garden. Seeds were collected off giant plants growing in clay pans near Artesia, NM. This area gets hit by the artic fronts that flow down the plains. This is a very cold hardy species that gets a semi-tuberose root. 
 
We share our experiences to help with your own trials of cold hardiness. We do not guarantee these plants in any garden or zone. Every garden is different and everyones growing conditions are different. Please try plants at your own risk, I do not want to be misleading to anyone.
 
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